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CT scan of the sinuses (CT PNS)

A CT scan of the sinuses (CT PNS) is a ct test of the face. It shows sinus blockage, polyps, anatomy before surgery. Typical effective dose 0.5 to 1 mSv, similar to about 2 to 4 months of natural background radiation (about 3 mSv a year).

सामान्य स्वास्थ्य जानकारी — यो निदान होइन। आपत्कालमा १०२ मा फोन गर्नुहोस्। सधैं योग्य स्वास्थ्यकर्मीसँग सल्लाह लिनुहोस्।

What it shows

Sinus blockage, polyps, anatomy before surgery.

Why it is done

Chronic sinusitis, planning sinus surgery.

Preparation

Remove metal objects. If contrast is used you may need to fast for a few hours; tell staff about allergies, kidney disease, diabetes medicines (metformin) or pregnancy.

Radiation & safety

Typical effective dose 0.5 to 1 mSv, similar to about 2 to 4 months of natural background radiation (about 3 mSv a year). Tell staff if you are or might be pregnant; the benefit usually outweighs the small risk, and shielding or alternatives can be considered.

How long it takes

5 to 10 minutes. General information, not a diagnosis. Results must be interpreted by a qualified health worker.

Sample type

CT

नतिजा व्याख्या गर्न डाक्टरलाई देखाउनुहोस् — एउटै परीक्षणले निदान गर्दैन।

यो कहाँ गर्न सकिन्छ

तपाईंनजिकको हेरचाह

नजिकका सुविधा देखाउन तपाईंको स्थान एक पटक प्रयोग गर्छ। केही सुरक्षित गरिँदैन।

सामान्य प्रश्न

What does a ct pns show?
Sinus blockage, polyps, anatomy before surgery.

Why is a ct pns done?
Chronic sinusitis, planning sinus surgery.

How do I prepare for a ct pns?
Remove metal objects. If contrast is used you may need to fast for a few hours; tell staff about allergies, kidney disease, diabetes medicines (metformin) or pregnancy.

Does a ct pns use radiation?
Typical effective dose 0.5 to 1 mSv, similar to about 2 to 4 months of natural background radiation (about 3 mSv a year). Tell staff if you are or might be pregnant; the benefit usually outweighs the small risk, and shielding or alternatives can be considered.

How long does a ct pns take?
5 to 10 minutes

CT scan of the sinuses (CT PNS) किन गरिन्छ?
Chronic sinusitis, planning sinus surgery.

CT scan of the sinuses (CT PNS) का लागि कसरी तयारी गर्ने?
Remove metal objects. If contrast is used you may need to fast for a few hours; tell staff about allergies, kidney disease, diabetes medicines (metformin) or pregnancy.

CT scan of the sinuses (CT PNS) गर्भावस्थामा सुरक्षित छ?
Typical effective dose 0.5 to 1 mSv, similar to about 2 to 4 months of natural background radiation (about 3 mSv a year). Tell staff if you are or might be pregnant; the benefit usually outweighs the small risk, and shielding or alternatives can be considered.

SI text CC BY 4.0; RadiologyInfo.org (ACR/RSNA) and MedlinePlus linked as references only, no text copied.

स्रोत: SI health summary (own words); decoder imaging pack; RadiologyInfo.org and MedlinePlus as references only

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